Red lentils, also known as masoor dal, are a type of legume with a distinct red or orange color and a mild, slightly nutty flavor. They are a versatile cooking ingredient, often used in soups, stews, curries, and other dishes. Red lentils are highly nutritious, being a good source of protein, fiber, iron, and folate. They also contribute to a sense of fullness and are a convenient addition to various cuisines.